Soybean Alternaria leaf spot: Alternaria tenuissima
Symptom:
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Seed become small and shrivelled. Dark, irregular, spreading sunken areas occur on the seed.
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The appearance of brown, necrotic spots with concentric rings on foliage, which coalesce and form large necrotic areas.
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Infected leaves later in the season dry out and drop prematurely.
Management:
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Use healthy/certified seeds
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Destroy crop residues from fields.
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Seed treatment with thiram + carbendazium (2:1) @ 3g/kg seed.
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Use Mancozeb or copper fungicide at 2.5g/l or carbendazim 1 g/lit.
Source-
- TamilNadu Agritech Portal
